Frontier's UpFront Plus seats guarantee an empty middle seat for added comfort.
Early morning flights have a better chance of on-time departure and arrival.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $86 (Cheapflightsfares) |
One-way from | $53 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $168 |
Good round-trip deal | $259 or less |
Good one-way deal | $139 or less |
Fly from
Fly to
Route
Depart
Return
Price
San FranciscoDenver
SFO - DEN
SFODEN
San Francisco
Sat 1/31
9:15 am-12:45 pm
Nonstop2h 30m
Denver Intl
Mon 2/2
8:35 am-10:30 am
Nonstop2h 55m
San FranciscoDenver
SFO - DEN
SFODEN
San Francisco
Sat 1/31
11:36 am-10:53 am
1 stop22h 17m
Denver Intl
Mon 2/9
11:49 am-6:43 pm
1 stop7h 54m
San FranciscoDenver
SFO - DEN
SFODEN
San Francisco
Sat 1/24
5:10 am-8:40 am
Nonstop2h 30m
Denver Intl
Wed 1/28
10:30 am-2:20 pm
1 stop4h 50m
San FranciscoDenver
SFO - DEN
SFODEN
San Francisco
Sat 2/21
5:00 am-1:20 pm
2 stops7h 20m
Denver Intl
Wed 2/25
10:40 am-2:20 pm
1 stop4h 40m
San FranciscoDenver
SFO - DEN
SFODEN
San Francisco
Tue 4/21
6:35 am-11:44 pm
1 stop16h 09m
Denver Intl
Tue 4/28
7:00 am-11:48 pm
1 stop17h 48m
San FranciscoDenver
SFO - DEN
SFODEN
San Francisco
Fri 1/23
7:00 am-6:41 pm
1 stop10h 41m
Denver Intl
Sat 1/24
8:04 am-8:32 am
1 stop25h 28m
San FranciscoDenver
SFO - DEN
SFODEN
San Francisco
Tue 1/20
4:46 pm-11:35 pm
1 stop5h 49m
Denver Intl
Sun 1/25
7:00 am-2:00 pm
1 stop8h 00m
San FranciscoDenver
SFO - DEN
SFODEN
San Francisco
Sat 1/17
4:46 pm-11:35 pm
1 stop5h 49m
Denver Intl
Sun 1/25
7:00 am-2:00 pm
1 stop8h 00m
San FranciscoDenver
SFO - DEN
SFODEN
San Francisco
Tue 1/20
4:46 pm-11:35 pm
1 stop5h 49m
Denver Intl
Thu 1/22
12:34 pm-4:32 pm
1 stop4h 58m
San FranciscoDenver
SFO - DEN
SFODEN
San Francisco
Tue 2/3
4:03 pm-11:21 pm
1 stop6h 18m
Denver Intl
Sat 2/7
12:46 pm-11:30 pm
2 stops11h 44m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
To ensure you get the cheapest price possible for a flight from San Francisco to Denver, you should look to book at least 53 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, February is the cheapest month in which you can book a flight from San Francisco to Denver (average of $28). Flying from San Francisco to Denver in June is currently the most expensive (average of $106). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
One of the essential ways to save on airfare from San Francisco to Denver is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 33% on airfare.
Travelers seeking maximum savings on their San Francisco to Denver flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
About 17% of weekly flights between San Francisco and Denver have experienced delays in the past year, with the average delay time being 143 minutes.
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Over the last year, United Airlines have had the lowest number of delays on this route, with just 13% of flights being delayed.
Entertainment
Overall
Food
Crew
Comfort
Boarding
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Food
Crew
Comfort
Boarding
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Food
Crew
Comfort
Boarding
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Food
Crew
Comfort
Boarding
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Food
Crew
Comfort
Boarding
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Food
Crew
Comfort
Boarding
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$69 | Average$189 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$88 | Average$100 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$157 | Average$279 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$164 | Average$329 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$176 | Average$428 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$216 | Average$276 | FlexibilityNo cancel fee | On-timeN/A |